Question

1) Bleaching powder is a compound of
A) Calcium B) Sodium C) Magnesium
D) Sulphur
2) The only material which can be recycled to 100% is
A) Polyethene bag B) Glass
C) bakelite D) Cement
3) A mixture of sand, cement, gravel and water in correct proportion in called
A) Mica
B) Asbestos e Concrete C) concrete D) Thermic mixture


please answer !!!!!!!
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Answer 1

1. calcium
2. Bakelite
3. concrete